Reddit reviews Polyurethane Expanding Liquid Foam 1/2 Gallon KIT, 8 LB Density Polyurethane Foam, Includes 1 Quart Part A & 1 Quart Part B, 2 Part Polyurethane Marine Foam
We found 2 Reddit comments about Polyurethane Expanding Liquid Foam 1/2 Gallon KIT, 8 LB Density Polyurethane Foam, Includes 1 Quart Part A & 1 Quart Part B, 2 Part Polyurethane Marine Foam. Here are the top ones, ranked by their Reddit score.
PERFECT Boat Foam for Structural Applications! Polyurethane Mix / Pour Foam. COAST GUARD CERTIFIABLE AS FLOTATION FOAM. Resistant To Water Penetration (Can Be Used For Flotation And Insulation).2 PART FOAM! Urethane Liquid Transforms Into A Rigid Closed Cell Foam Resistant To Water Absorption.Once Cured, Poly Urethane Foam Can Be Laminated Over With Polyester, Epoxy Or Vinyl Ester Resin Without Problems.LIQUID URETHANE EXPANSION FOAM Can Be Poured In Multiple Layers With Excellent Bonding Between Layers.1/2 Gal. of Mixed Liquid Makes 1/2 Cu Ft of Foam.
You can find two part expanding foam at places like TAP Plastics or on Amazon. It's cheaper in the long run if you intend on making a lot of stuff out of foam.
>>Polyurethane Expanding Liquid Foam 1/2 Gallon KIT, 8 LB Density Polyurethane Foam, Includes 1 Quart Part A & 1 Quart Part B, 2 Part Polyurethane Marine Foam https://www.amazon.com/dp/B007V231P6/ref=cm_sw_r_cp_apa_i_.Y2QDbADQJEHA
https://www.tapplastics.com/product/repair_products/foam_insulation_materials/tap_x_30_polyurethane_foam/79
> no. you haven't added more stiffness than freakin welded in bars
how would foam improve stiffness anyway? haha
Well, since you asked so nicely...
Let's start off with the basics. Unibodies have hollow areas in them. Hollow objects are not solid, and they can flex. Not good.
There are types of expanding foam made out of urethane. The urethane expands and hardens as it dries. It's used in a variety of other applications, such as watercraft with fiberglass that needs reinforcement and help with buoyancy.
If you put it in certain hollow parts of the unibody, it stiffens them from the inside. This strengthens the area more than simply welding a cage to the outside of it. If the weld fails, then so does the reinforcement.
Key areas of application include the top of the a-pillar where the roofline curve begins, and parts of the lower frame rails, where the doorsills are. The unibody does not need to be completely filled with the foam.
Care has to be taken when using it, because some of the vehicle's wiring may be routed through these hollow areas. If you used the foam without removing that wiring and re-routing it, then that's that. Forget about accessing it later.
The foam is initially applied by mixing two different liquids together. As the foam dries and hardens, it expands. Some have used a bit too much, and watched the foam come spilling back out of the hole they poured in.
There are other pitfalls associated with the urethane foam. The foam also happens to be flammable, so there's another area to be careful. People have also bought the wrong material kit, and ended up filling their frame with goop similar to caulk that never dried or hardened.
However, when properly used, one can enjoy the benefits of greatly increased chassis stiffness without the fabrication work and added weight of a roll cage. Roll cages also present a challenge and potential hazard for street applications, since it is all too easy for the driver or passenger to be jolted and strike the cage with their own body. Even with padding around the bars, impact can lead to injury. The foam-filling method presents a safer option for those with cars that are mostly used on the road.