To bond sofa foam flat, firm and without stiffening the foam, the fastest way is to use spray adhesive instead of hand-brushing adhesive. This article explains step by step how to bond sofa and mattress foam with Su Tu Vang 228 spray adhesive, along with the mistakes workers often make and how to avoid them.
Why use spray adhesive to bond sofa foam?
- Thin, even adhesive layer: sprayed as a fine film so the foam does not stiffen and keeps its softness.
- Nhanh: one person can spray a whole foam sheet in a few dozen seconds, much faster than hand brushing.
- Saves adhesive: a thin adhesive layer wastes less than thick brushing.
- Easy on corners and edges: sprays into the corners, edges and curves of armrests and backrests.
See also: What is spray adhesive? Types and how to choose.
Preparation before bonding sofa foam
- Keo: 228 spray adhesive (3 kg can), spray gun and air compressor.
- Material: PU foam, EVA foam or mattress; wood frame, plywood or backing foam to be bonded.
- Surface: dry, free of dust, with no oil or grease and no moisture.
- Protection: mask, gloves, goggles. Work in a ventilated place, away from flames and electrical sparks because the adhesive is flammable.
How to bond sofa foam with 228 spray adhesive: 5 steps
- Cut and position the foam. Cut the foam to size and test-place it on the frame to make sure it fits before spraying.
- Spray adhesive on both surfaces to be bonded. Hold the gun about 20–25 cm from the surface and spray steadily in one thin layer, covering edges and corners fully.
- Wait until the adhesive turns tacky. Wait a few minutes for the adhesive to turn tacky (depending on layer thickness and weather). Lightly touch: if it feels sticky but does not smear on your hand, you can bond.
- Press into the correct position. Place the two surfaces in position and press firmly from the center outward to push out air bubbles. The adhesive grips immediately, so align precisely before joining.
- Finish. Smooth the edges and check corners and borders. Let the adhesive settle before covering with fabric or leather.
Common mistakes when bonding sofa foam
| Mistake | Cause | How to avoid it |
|---|---|---|
| Foam turns stiff | Spraying too thickly | Spray a thin, even layer; do not overspray one spot |
| Bond does not stick, edges peel | Dirty or damp surface, or forgot to spray the edges | Clean, let dry, spray edges and corners carefully |
| Bubbles, unevenness | Uneven pressing, trapped air | Press from the center outward |
| Bonded before the adhesive turned tacky | Rushing, bonding while the adhesive is wet | Wait until the adhesive turns tacky before pressing |
Which materials can 228 spray adhesive bond?
Besides sofa foam, 228 spray adhesive is also used to bond mattresses, PU foam, EVA foam, soundproofing and thermal insulation foam. See also the guide: spray adhesive for mattresses.
228 spray adhesive prices
228 spray adhesive 3 kg can priced from 450,000 VND. Prices may change by quantity; contact us for an exact quote. Learn more about adhesive lines at What is adhesive? Types of industrial adhesive.
The prices above exclude 8% VAT. Prices shown in the store include VAT.
Frequently asked questions
What adhesive works well for bonding sofa foam?
Use a spray adhesive made for foam such as 228: thin, even application, little foam stiffening and fast bonding.
Does 228 spray adhesive stiffen foam?
If sprayed in a thin, even layer the foam keeps its softness. Spraying too thickly or overlapping many layers will stiffen the foam.
How long after spraying should I bond?
Wait a few minutes for the adhesive to turn tacky; when it feels sticky to a light touch but does not smear on your hand, bond. The time depends on layer thickness and weather.
Is spray adhesive flammable?
Yes. Spray adhesive contains solvent and is flammable. Work in a ventilated place, away from flames and electrical sparks, and wear a mask and gloves when spraying. See the product MSDS for more.
Need advice or a quote for 228 spray adhesive? Call 0976.884.341 (Zalo) for support.
View all adhesive products Su Tu Vang industrial adhesives by material.
