---
product_id: 624887052
title: "GORILLA GRIP Couch Cushion Support Board for Sagging Sofas, 21.5x70 Gray | Heavy Duty Slip Resistant Thick Boards Add Strong Seat Supports for Couch, Replacement Stuffing Firmer Couches Accessories"
brand: "gorilla grip"
price: "23317F"
currency: XPF
in_stock: true
reviews_count: 13
category: "Gorilla Grip"
url: https://frenchpolynesia.desertcart.com/products/624887052-gorilla-grip-couch-cushion-support-board-for-sagging-sofas-21
store_origin: PF
region: French Polynesia
---

# Slip-resistant PVC grip dots 0.43-inch thick premium plywood 21.5x70 inch wide coverage GORILLA GRIP Couch Cushion Support Board for Sagging Sofas, 21.5x70 Gray | Heavy Duty Slip Resistant Thick Boards Add Strong Seat Supports for Couch, Replacement Stuffing Firmer Couches Accessories

**Brand:** gorilla grip
**Price:** 23317F
**Availability:** ✅ In Stock

## Summary

> 🛋️ Transform Your Saggy Sofa Into a Throne of Comfort!

## Quick Answers

- **What is this?** GORILLA GRIP Couch Cushion Support Board for Sagging Sofas, 21.5x70 Gray | Heavy Duty Slip Resistant Thick Boards Add Strong Seat Supports for Couch, Replacement Stuffing Firmer Couches Accessories by gorilla grip
- **How much does it cost?** 23317F with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [frenchpolynesia.desertcart.com](https://frenchpolynesia.desertcart.com/products/624887052-gorilla-grip-couch-cushion-support-board-for-sagging-sofas-21)

## Best For

- gorilla grip enthusiasts

## Why This Product

- Trusted gorilla grip brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Unmatched Durability:** Premium .43-inch plywood supports up to 400 lbs without sagging.
- • **Custom Fit Flexibility:** Foldable and stackable to fit loveseats and smaller sofas—measure once, support forever.
- • **Effortless Installation:** Tool-free, foldable design lets you upgrade your sofa in minutes—no handyman needed.
- • **Maximized Couch Coverage:** Wide 21.5-inch by 70-inch board stabilizes entire seat area for ultimate comfort.
- • **Stay-Put Grip Technology:** Hundreds of non-slip PVC dots keep the board firmly in place—no shifting, no fuss.

## Overview

The GORILLA GRIP Couch Cushion Support Board is a heavy-duty, 21.5x70 inch plywood insert designed to reinforce sagging sofas. Made from durable .43-inch thick plywood, it supports up to 400 pounds and features slip-resistant PVC grip dots to prevent shifting. Easy to install and foldable for versatile fit, it instantly restores firmness and comfort to worn-out couches, making it a must-have for anyone craving a supportive, long-lasting seating upgrade.

## Description

desertcart.com: GORILLA GRIP Couch Cushion Support Board for Sagging Sofas, 21.5x70 Gray | Heavy Duty Slip Resistant Thick Boards Add Strong Seat Supports for Couch, Replacement Stuffing Firmer Couches Accessories : Home & Kitchen

Review: LIFE CHANGING FOR SAGGY COUCHES! No more back pain! - Wow! Where has this been my couch life?!? I have only had my couch a few months, but it would make my back hurt b/c it was saggy already. (It was cheap, what can I say.) I was curious how this would actually work. I didn’t think it would make that big of a difference. It is a night & day difference!!! So firm now! So comfortable to sit on my couch now. It is like magic how it much it has changed the comfort of my couch. Buy it! Life changing! My back doesn’t hurt anymore! It seems to hold in place fine after a few days. I’m in love!
Review: Well made for support - I received the item in a large box packed very well. My outdoor couch has a broken slat at the bottom of one seat and I was too lazy to get it fixed so I ordered this cushion support. It sure makes a difference with that support. It’s now sturdy and I don’t sink in the seat.

## Features

- ADD STRONG, LONG LASTING SUPPORT TO COUCHES AND SOFAS: easily and quickly upgrade your sagging couch or sofa with our ultra-strong, high-quality plywood sofa cushion support board; adds extra support and comfort to couches with sagging frames, cushions, or worn-out springs; our sofa support boards are 21.5” wide to cover more surface area, providing more couch cushion support for sagging couch seats
- ULTRA DURABLE .43 INCH THICK PLYWOOD BOARDS: unlike other couch support options that use MDF or particle board, ours is made with premium .43” thick plywood that is naturally stronger and more durable; this heavy-duty couch board support for sagging seats can hold up to 400 pounds
- STAY IN PLACE GRIP DOTS: designed to stay in place on sofas, this under couch cushion support features hundreds of slip resistant PVC dots on the underside; these grip dots help the couch supporter for under the cushions grip to sofa frame and prevent sofa board from shifting during daily use; individual couch board panels feature rounded corners to reduce chance of cover tearing
- EASY TO INSTALL: installation is simple and fast; simply remove the cushions from your sagging couch, unfold the cushion supports for sagging cushions, and lay them across the width of sofa frame with grip dots on the underside; add cushions back to sofa on top of support board
- FOLDABLE AND STACKABLE FOR UNIVERSAL FIT: boards are available in standard sofa furniture sizes for a perfect fit, but can be folded and stacked to accommodate loveseats and smaller couches; we recommend measuring your sofa before purchase; measure your couch seat width from left inside arm to right inside arm; this support board measures 70 inches

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CGBF9441 |
| Accent Color | Gray |
| Additional Features | Easy To Install, Folding, Non Slip, Stackable, Tool Free Assembly |
| Age Range Description | Adult |
| Arm Style | Armless |
| Assembly Instructions Description | Already Assembled |
| Back Style | Backless |
| Best Sellers Rank | #4,663 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #1 in Sofa Replacement Parts |
| Brand | GORILLA GRIP |
| Brand Name | GORILLA GRIP |
| Color | Grey |
| Component Connector Assembly | Not Required |
| Cushion Construction | Solid Plywood Boards with Grip Dots |
| Cushion Style | Boxed Edge |
| Customer Reviews | 4.5 out of 5 stars 4,351 Reviews |
| Fill Material | Heavy Duty .43" Plywood Boards |
| Frame Color | Gray |
| Furniture Leg Material | Engineered Wood |
| Has Removable Seat Cushion Cover | false |
| Included Components | Rejuvenator Board |
| Indoor Outdoor Usage | Indoor |
| Item Depth | 21.5 inches |
| Item Dimensions | 21.5 x 70 x 0.43 inches |
| Item Dimensions D x W x H | 21.5"D x 70"W x 0.43"H |
| Item Firmness Description | supportive |
| Item Weight | 9.1 pounds |
| Manufacturer | Hills Point Industries, LLC |
| Manufacturer Part Number | 840316706964 |
| Material Features | Slip-resistant PVC grip dots |
| Material Type | Engineered Wood |
| Minimum Weight Capacity | 181.4 kg |
| Model Number | 840316706964 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Pattern | Solid |
| Product Care Instructions | Spot Clean with Damp Cloth, Wipe with Damp Cloth |
| Product Dimensions | 21.5"D x 70"W x 0.43"H |
| Recommended Uses For Product | Supporting sofas |
| Room Type | Guest Room, Home Office, Living Room, Study Room, Sunroom |
| Seat Cushion Configuration | Single Cushion Seat |
| Seat Cushion Quantity | 1 |
| Seat Cushion Removability | Removable |
| Seat Depth | 21.5 inches |
| Seat Fill Material | Foam |
| Seat Height | 0.43 inches |
| Seating Capacity | 4 |
| Shape | Rectangular prism |
| Size | 21.5" x 70" Sofa |
| Sofa Type | Standard |
| Style Name | Modern |
| UPC | 840316706964 |
| Upholstery Color | Grey |
| Weight Capacity Maximum | 400 pounds |
| Weight Limit | 400 pounds |

## Product Details

- **Brand:** GORILLA GRIP
- **Color:** Grey
- **Item Weight:** 9.1 pounds
- **Product Dimensions:** 21.5"D x 70"W x 0.43"H
- **Seat Depth:** 21.5 inches
- **Seat Height:** 0.43 inches
- **Seating Capacity:** 4
- **Style:** Modern
- **Type:** Standard
- **Weight Limit:** 400 pounds

## Images

![GORILLA GRIP Couch Cushion Support Board for Sagging Sofas, 21.5x70 Gray | Heavy Duty Slip Resistant Thick Boards Add Strong Seat Supports for Couch, Replacement Stuffing Firmer Couches Accessories - Image 1](https://m.media-amazon.com/images/I/71vlBPmRHCL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Questions & Answers

**Q: How does this sofa cushion support board help fix a sagging couch?**
A: The sofa cushion support board is designed to add firm, long-lasting reinforcement under sagging cushions. The .43" thick plywood helps restore shape & comfort to couches with worn-out springs or sinking cushions to extend the life of your furniture.

**Q: What is the couch cushion support made of, and how durable is it?**
A: Unlike other supports made with particle board or MDF, this board is crafted from heavy-duty plywood that’s strong, stable, and built to last. Thick panels support up to 400 lbs without bending or breaking, offering superior strength for daily use.

**Q: How does the sofa cushion support board stay in place once installed?**
A: The couch supports for sagging cushions are designed with hundreds of non-slip PVC grip dots on the underside that help keep it securely in place. These stay-in-place grip dots prevent shifting during everyday use.

**Q: Is the couch cushion support board easy to install and fit different couch sizes?**
A: Yes, simply remove your cushions, unfold the support board, place it grip-side down, and put your cushions back on top. The foldable and stackable design allows you to customize the fit for various furniture types, from loveseats to full-size sofas.

## Customer Reviews

### ⭐⭐⭐⭐⭐ LIFE CHANGING FOR SAGGY COUCHES! No more back pain!
*by M***H on August 12, 2026*

Wow! Where has this been my couch life?!? I have only had my couch a few months, but it would make my back hurt b/c it was saggy already. (It was cheap, what can I say.) I was curious how this would actually work. I didn’t think it would make that big of a difference. It is a night & day difference!!! So firm now! So comfortable to sit on my couch now. It is like magic how it much it has changed the comfort of my couch. Buy it! Life changing! My back doesn’t hurt anymore! It seems to hold in place fine after a few days. I’m in love!

### ⭐⭐⭐⭐⭐ Well made for support
*by K***A on July 27, 2026*

I received the item in a large box packed very well. My outdoor couch has a broken slat at the bottom of one seat and I was too lazy to get it fixed so I ordered this cushion support. It sure makes a difference with that support. It’s now sturdy and I don’t sink in the seat.

### ⭐⭐⭐⭐⭐ One of my best purchases ever.
*by E***K on August 11, 2026*

This may be my most satisfying purchase yet. We have an eight year old West Elm large sectional sofa and the seats are sagging. It hurts our backs and has become really uncomfortable (too soft!). I can’t afford a new sofa so decided to try these. The difference is shocking. Nice firm seats, we can lay down flat, the cushions look raised like they used to. I’m so grateful. Between cleaning the couch and putting these supports in we have what feels like a new sofa again. Excellent product!!!

## Frequently Bought Together

- GORILLA GRIP Heavy Duty Couch Cushion Support Board to Fix Sagging Sofas, 21.5 x 70 Sofa, Thick Plywood Boards Add Strong Seat Supports, Stays in Place, Replacement Stuffing Under Couches, Gray
- FoamJoy Couch Cushion Support for Sagging Seat - 20" x 20" High-Density Curved Foam Sofa Cushion Support Board, Couch Supporter for Under The Cushions, Grey Set of 3
- LAVEVE Heavy Duty Couch Cushion Support for Sagging Seat 21.5''x70'', Thicken Solid Wood Sofa Under Cushions Boards, Perfectly Fix and Protect Seat, Extend Life

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*Product available on Desertcart French Polynesia*
*Store origin: PF*
*Last updated: 2026-08-24*