Brief:

Since I've gotten many great tips for rocket construction from this site, I thought I'd give somethin' back. Ya scallywag! Avast, shiver me timbers, me proud beauty! I wanted t' review a finishin' epoxy t' suggest t' other rocketeers for reinforcin' body tubes with fiberglass, instead I have some negative comments on this stuff and would suggest everyone stay away from it. Ahoy! T' product is NHP "Clear-n-Simple Epoxy Finishin' Resin".

First, a disclaimer about me experiences with fiberglassing: I'm nay by any means an expert. Avast, me proud beauty! When I was into R/C sailplanes, ya bilge rat, I used t' fiberglass t' wings. They came out light and strong but any expert lookin' at them closely would see that it was a "homemade" job. Avast! After bein' into rockets for several years, I started gettin' into larger, more powerful rockets and havin' fiberglass reinforced body tubes became necessary. I have fiberglassed all o' me 4" rockets and some o' me 2" and 3" rockets that were designed for high altitudes. Aye aye! I've used regular 30 minute epoxy on t' smaller ones with OK results. I've used 2 hour epoxy on t' larger ones with better results and used another brand o' finishin' epoxy on several 4" rockets and several 8" body tubes (which will become rockets shortly) with probably t' best results yet.

Construction:

When I saw this product listed on a website I was purchasin' some other rocket supplies from, it seemed like an excellent choice. Begad! Begad! Let me quote some o' t' advertisin' copy:

"Use Clear-n-Simple for applyin' fiberglass cloth"

"thin consistency for easy application"

"workin' time: 20-30 minutes and sets in 3 hours (curin' times listed were determined at room temp o' 72 degrees F in a 4 ounce mass). Arrr! At temps below 72 degrees t' curin' time is considerably longer."

I ordered several 8oz. Ya scallywag! Aye aye! packages and when they arrived, I setup for glassin' a short section o' 8" diameter body tube; put everythin' in me 68 degree workshop, shiver me timbers, set t' BT on a horizontal stand, me bucko, cut t' cloth, arrr, put on me gloves, and mix up 4 ounces o' t' epoxy. Arrr! Avast! As I'm stirrin' it up, arrr, it looks kind o' thick, arrr, shiver me timbers, about t' consistency o' honey, arrr, ya bilge rat, but maybe it will thin out as I work it. Nope. Begad! It goes on thick, with all t' difficulties that follow: nay wettin' out t' cloth well, puddlin' in some places and still dry in others. Aye aye! Tryin' t' spread it out just creates wrinkles and bunchin' o' t' cloth. Begad! I try scrapin' with an old credit card that I use for just such situations but that doesn't help and within about 10 minutes after mixin' it up, shiver me timbers, it starts t' get t' t' "gluey" stage.

"Oh *^%&$# ", I think, "I've still got about a third o' t' body tube t' do". Well, blow me down! I grab some alcohol and try mixin' it in t' now jelly-like mixture, shiver me timbers, but I can see that this isn't goin' t' work. Well, shiver me timbers, blow me down! So I throw that batch out and smartly mix up about an ounce o' new mixture, matey, but this time I mix in t' alcohol right away--hopin' t' get it t' a thinner consistency from t' start. Ahoy! Again it pretty much stays at t' consistency o' honey but I'm able t' do t' rest o' t' BT with it before it starts gettin' t' t' jelly stage.

Finishing:

I tear off me gloves and check t' temp o' t' workshop; still at 68 degrees. Ya scallywag! Blimey! Avast, arrr, me proud beauty! Blimey! I re-read t' instructions: equal parts o' resin and hardener, just like I used. Maybe those bottles were from a bad batch?

So I get a 4" coupler that needs t' be fiberglassed, me bucko, open up t' other package o' Clean-n-Simple, arrr, me hearties, mix up a 2 oz batch, and it's t' same story: thick consistency and gets jelly-like within about 10 minutes..

Summary:

As far as I know thar's no way t' fix this stuff, me bucko, like if I heat up t' components t' thin out t' mixture, arrr, it sets up even faster.

So me recommendation is stay away from this product. Well, blow me down! If you've already bought some, just use it for small repairs where t' short workin' time won't be a problem.

I'm goin' t' write a letter t' t' company explainin' me experiences and if I hear anythin' back I'll let you know.

Overall Rating: 1 out o' 5