Recent content by stoneburner

No. Looks like it would create too much tearing/roughness of the foam which would make the final laminated surface too rough for surfboard aesthetics. The WPT rolls almost effortlessly over the XPS surface and perforates the foam readily with many fine peforations. In every case, the FG cloth...

The spacers/washers and tynes of the TopFlite WoodPecker tool can be removed and/or added. A couple of Christmases ago the online retailer offered free shipping on their WPTs. I bought 2 WPTs so I could use the tynes from one to double the number of tynes in the other (twice as many...

Higher density XPS does not crush or shear/tear as easily as low density XPS. Because it has higher density there is less potential for expansion too. XPS should not outgas. It only aborbs 0.1%-0.3% moisture by volume because all cells are completely closed. Gas does not circulate freely...

My pleasure ersatzknarf. BTW some denatured alcohol (DNA) can contain denaturing agents that dissolve XPS (acetone, etc.). Be sure to check the MSDS of the DNA. I have never tried DNA. For my last project, I tried isopropyl alcohol for wipe down, then let surfaces dry before further prepping...

OK, I reviewed this entire thread to make sure I wan't missing anything. My interest in XPS is surfcraft construction (surfboards, body boards, etc.). Not soaking up water is a huge advantage for surfcraft when they get dinged while in use. XPS densities are similar to the PU foam used for...

Yep. That's the usual problem. The high density XPS foams don't have high public demand so they're not usually stocked by Lowes, HD and retail lumber outlets. This last autumn I just discovered that HD in my area carries the Foamular 250 year-round. BTW some of the surfboard epoxies are quick...

Are you located in the States? Have you been able to locate a dealer/retailer for the Dow Panel Core 20-30-40 XPS? Looks like O-C makes their PinkCore Tight Tolerance Board in 15-25-40-60 XPS.

at rruff I found some Dow High Load 40 & 60 for a reasonable price by contacting a construction contractor who did occasional commercial refrigeration projects. For surfcraft, I would not go below 25 Psi. One solution used by surfboard builders is using wood veneer over lower density EPS foam...

The advantages of Polyurethane foam (PU) are that it can be molded. And it has better heat resistance and is more porous than XPS. The density of molded PU is not uniform, being more dense at the surface -- a disadvantage if you over sand. PU also soaks up water. The advantage of XPS is that...

Hard to tell just by looking. If it is Dow insulation foam it is XPS (extruded polystyrene). Dow XPS insulation is blue and Owens-Corning is pink.

Hello, I did the XPS peel panel blog at the link rruf posted: After seeing this thread I updated the blog. 01 January 2018 It has been a few years. In retrospect, I abandoned the sealer. It filled the roughed peaks and valleys without adding any apparent improved bonding with epoxy. I liked...